/jp/ - Otaku Culture

>>15891439
Oh, I would like to explain, Magical Charming and Quintuple Splash the siblings are separated for many years because in both cases the sisters go to girl's only schools up until the protagonist joins them. It's believable that siblings separated their whole lives may become attracted to each other when reunified.

Angel Ring 'almost' fits what you're after as she only reveals her feelings for her brother on her own route. All others she's supportive of the heroines.

Hatsukoi of course is Hatsukoi. Probably the best and most believable reason why siblings would fall for each other, their parents are garbage and they cling to each other for support.

I literally had a high school acquaintance who fucked his own sister for the same reason, got caught, and force transfered out of school. The whole school knew about it after that. Take it as you will.